[all-commits] [llvm/llvm-project] 546901: [AArch64] FP/SIMD is not mandatory for v8-R (#79004)

[ostannard via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5469010ba73701d47498576a433aea5c6e16ba2c
      https://github.com/llvm/llvm-project/commit/5469010ba73701d47498576a433aea5c6e16ba2c
  Author: ostannard <oliver.stannard at arm.com>
  Date:   2024-01-24 (Wed, 24 Jan 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64.td
    M llvm/test/MC/AArch64/armv8.1a-rdma.s
    M llvm/test/MC/AArch64/armv8.2a-dotprod-errors.s
    M llvm/test/MC/AArch64/armv8.2a-dotprod.s
    M llvm/test/MC/AArch64/armv8r-sysreg.s
    M llvm/test/MC/Disassembler/AArch64/armv8.3a-complex.txt
    M llvm/test/MC/Disassembler/AArch64/armv8.3a-js.txt

  Log Message:
  -----------
  [AArch64] FP/SIMD is not mandatory for v8-R (#79004)

The FP/SIMD instructions are optional for v8-R, so they should not be
marked as a dependency of HasV8_0rOps. This had the effect of disabling
some v8R-specific system registers when any of these features was
disabled.

I've moved these features to be enabled by default for Cortex-R82
(currently the only v8-R AArch64 core), matching the previous behavior,
and clang's default.

Based on a patch by Simi Pallipurath <simi.pallipurath at arm.com>